西藏林芝地区蚊媒初步调查研究

Preliminary investigation of vector mosquitoes in Nyingtri,Tibet

目的确定西藏林芝地区墨脱县及米林县流行性乙型脑炎(乙脑)传播媒介三带喙库蚊存在与否,为制定针对性防制措施提供依据;了解林芝地区的媒介蚊虫种类、数量及其分布状况。方法采用诱蚊灯法、人帐诱法和人工捕捉法进行调查。结果在墨脱县发现三带喙库蚊,且该蚊密度相对比较高;墨脱县的优势蚊种为三带喙库蚊和多斑按蚊。米林县未发现三带喙库蚊分布,该地区的优势蚊种为米塞按蚊。结论西藏林芝地区墨脱县存在乙脑的传播媒介,该蚊种为该地区的新纪录;且该蚊种尚未扩散至米林县。

Objective To confirm whether the principal vector for Japanese encephalitis（JE）,Culex tritaeniorhynchus,was present in Medog and Mainling counties of Nyingtri,providing the basis for development of specific control measures;and to determine the species,abundance and distribution of vector mosquitoes in Nyingtri.Methods Light traps,human-bait mosquito nets and labor capture were used for investigation in the region.Results Cx.tritaeniorhynchus was found in Medog county with relatively high density.The predominant species in Medog county were Cx.tritaeniorhynchus and Anopheles maculatus.However,Cx.tritaeniorhynchus was not detected in Mainling county,where the predominant species was An.messeae.Conclusion The principal vector for JE existed in Nyingtri,Tibet.This species was a new record in the region that had not spread to Mainling county.